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1.
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It is a perfect cycle.
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It is an imperfect cycle.
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2.
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It is a gaseous cycle.
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It is a sedimentary cycle.
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3.
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The major reservoirs of carbon are atmosphere, oceans and fossil fuels.
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The main reservoir of phosphate is ferric and calcium phosphate in rocks.
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4.
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Atmospheric inputs are greater.
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Atmospheric inputs are much smaller.
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5.
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Gaseous exchange between organisms and environment is high.
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Gaseous exchange between organisms and environment is negligible.
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